Add 80/42 and 3/70
1st number: 1 38/42, 2nd number: 3/70
80/42 + 3/70 is 409/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
80/42 = 80 × 5/42 × 5 = 400/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
3/70 = 3 × 3/70 × 3 = 9/210 - Add the two like fractions:
400/210 + 9/210 = 400 + 9/210 = 409/210 - So, 80/42 + 3/70 = 409/210
In mixed form: 1199/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42+6/70 80/84+3/70 80/42+9/70 80/42+15/70 80/42+21/70